 package com.shopping.pay.tenpay.util;
 
 import java.security.MessageDigest;
 
 public class MD5Util
 {
   private static final String[] hexDigits = { "0", "1", "2", "3", "4", "5", 
     "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
 
   private static String byteArrayToHexString(byte[] b)
   {
     StringBuffer resultSb = new StringBuffer();
     for (int i = 0; i < b.length; i++) {
       resultSb.append(byteToHexString(b[i]));
     }
     return resultSb.toString();
   }
 
   private static String byteToHexString(byte b) {
     int n = b;
     if (n < 0)
       n += 256;
     int d1 = n / 16;
     int d2 = n % 16;
     return hexDigits[d1] + hexDigits[d2];
   }
 
   public static String MD5Encode(String origin, String charsetname) {
     String resultString = null;
     try {
       resultString = new String(origin);
       MessageDigest md = MessageDigest.getInstance("MD5");
       if ((charsetname == null) || ("".equals(charsetname)))
         resultString = byteArrayToHexString(md.digest(resultString
           .getBytes()));
       else
         resultString = byteArrayToHexString(md.digest(resultString
           .getBytes(charsetname)));
     } catch (Exception localException) {
     }
     return resultString;
   }
 }


 
 
 